404 MR. F. N, WILLIAMS ON 
So named from the structure of the calyx. Both this and the next species 
belong to that group of the Maeranthe series which includes S. eretacea, This 
plant is, however, a difficult species to study and compare, Rohrbach’s descrip- 
tion (Monogr. n. 107, p. 135) is brief and somewhat vague : and there are only 
two sheets of 5, cretacea in Herb. Kew., including 5 specimens,—(1) and (2) 
from the Astrakhan Desert, (3) and (4) from chalky hills above the river 
Don, and (5) from 8. Russia. 
33. SILENE SUBCRETACEA, sp. п. (Ejusdem sect.) 
Caulis fruticulosus erectus, breviter 'anescenti-pilosus, 1—3-florus, 4 dem. 
Folia 7 mm., brevia linearia acuta uninervia, breviter canescenti-pilosa. 
Flores solitarii vel remoti, breviter pedieellati. Calyx 18 mm., tubuloso- 
clavatus pilosulus, basi truncatus, evenius, striis tenuibus, fructifer superne 
ampliatus; dentes oblongo-lanceolati acuti albo-marginati. Petala alba 
ecoronata, ungue exauriculato exserto. Capsula oblonga, carpophoro glabro 
sesquilongior. Semina papillosa, dorso suleato-excavata, faciebus concava. 
Khamba Fort, 1908 (Col. Younghusband, п. 13,—tlower-specimens) ; 
Gyangtse, 1904 (Capt. Walton, n. 105, n. 1108,—truit-specimens). 
31. SILENE Moorcrorriana, Rohrb. Monogr. Gatt. Silene, p. 129, n. 93 
(1868), forma Nana, Hook. f. Fl. Brit. Ind. 1. 219 (1814). 
Near Rakas Tal, 1848, from 4570 to 5180 m. (Strachey & Winterbottom). 
35. SILENE WALTONI, sp. п. (Sube. Eusilene, sect. Dotryosilene). 
Caulis ereetus robustus rotundatus rubens basi frutieulosus, alternatim 
ramosus, ramis divergentibus laxe racemosis, breviter pareeque pilosus. 
Rami floriferi primum racemosi, ramulis secundariis dichasia subcomposita 
gerentibus. Folia 9 mm., late virentia late linearia. vix &euta uninervia 
crassiuseula, subtus presertim ad nervum pilosula, margine hispidulo-ciliata. 
Dichasia secundaria longe pedunculata, floribus erectis ; flos centralis breviter 
pedicellatus, pedicello longior; bracteæ foliis consimiles. Calyx clavatus 
evenius umbilicatus tenuiter pilosulus, dentibus triangularibus obtusis late 
albo-marginatis dense ciliatis. Petala alba, ad faucem biappendiculata, 
unguibus glabris auriculatis distincte exsertis, lamina biloba, lobis latis. 
Filamenta glabra. Styli filiforrnes. 
Gyangtse, 1904 (Capt. Walton, n. 1105). 
Named after Capt. Walton, of whose assiduity in collecting Col. Young- 
husband speaks in such glowing terms. 
